الگو:Scientific American Frontiers
Appearance
"Scientific American Frontiers, on season 1". Scientific American Frontiers (به انگلیسی). Chedd-Angier Production Company. 1990–1991. Archived from the original on 2006. {{cite web}}
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ignored (help)نگهداری یادکرد:فرمت پارامتر تاریخ (link)